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Finding the Fourth Proportional to 1,868.64, 2,802.95 and 570.11

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Solution

The fourth proportional to 1,868.64, 2,802.95 and 570.11 is: 855.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.64 : 2,802.95 = 570.11 : x
  2. Step 2: Convert to fraction form
    1,868.64/2,802.95 = 570.11/x
  3. Step 3: Cross multiply
    1,868.64x = 2,802.95 × 570.11
  4. Step 4: Simplify right side
    1,868.64x = 1,597,989.82
  5. Step 5: Solve for x
    x = 1,597,989.82/1,868.64
  6. Step 6: Final answer
    x = 855.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.